Reading a thread I see reference to using a canted base for scopes on long range shooting. I think I understand this concept, but want to clarify my thoughts...
Isn't using a canted base just mean to place some sort of shim under one of the scope mounts to get the scope to sit slightly canted?
What if someone said "20 MOA", meaning their scope is set at that cant, what specifically does that mean? I understand MOA, but not for the cant. Does it mean the shim would cant the scope enough to have it impact a difference of 20" at 100 yards?
Wouldn't the cant for long range shooting be done exclusively on the back scope mount to get the front to prop down?
One last thing, I'm saying "shim", but think it's more than that. What exactly are you guys using or doing to cant your scope?